CONCORD, N.H. — Brad Delp’s fiancée found the rock singer dead at their Atkinson home after calling three times without getting through, police said Monday.

Delp, 55, lead singer for the band Boston, was found dead Friday. His death isn’t considered suspicious, but authorities said the state medical examiner’s office is investigating.

His fiancée, Pamela Sullivan, stayed out with friends Thursday night but called home Friday morning, Atkinson police Lt. William Baldwin said Monday.

“She had last heard from him the night before ... because she stayed out after work with some colleagues,” Baldwin said. “She tried that morning three times to get a hold of him, and could not, so she went home and found (him).”

No autopsy is planned, but toxicology tests are being performed, said Kim Fallon, an investigator for the medical examiner’s office.

Baldwin said police hope to finish their investigation and get the toxicology results by the end of the week.

On Monday, there were flowers left at the mailbox and on the front steps of Delp’s home.

A private funeral service will be held followed by a public memorial to be scheduled later, according to a statement from family and friends. Donations can be made in Delp’s memory to the American Heart Association in Framingham, Mass.

Delp, a native of Danvers, Mass., joined Boston in the mid-1970s and sang on two of the band’s biggest hits, “More Than a Feeling” and “Long Time.” He also sang on Boston’s most recent album, “Corporate America,” released in 2002.

He joined the band in the early 1970s after meeting Tom Scholz, an MIT student interested in experimental methods of recording music, according to the group’s official Web site. The band enjoyed its greatest success and influence during its first decade.

The band’s last appearance was in November at Boston’s Symphony Hall.

He had planned to marry Sullivan this summer during a tour with Boston. Delp, a lifelong Beatles fan, also played with tribute band Beatle Juice.

Beatle Juice performed a benefit last year to help build a new public library in Atkinson. James Halchak, 21, who organized the benefit, had dinner with Delp before the show and said he and others were amazed at how easy it was to approach him.

“We thought he was going to be a stereotypical rock-star guy, but he was so nice and down to earth,” said Halchak. “He was one of the nicest guys I ever met.”

In a highly-anticipated speech to Congress Tuesday, Israeli Prime Minister Benjamin Netanyahu argued that a potential nuclear deal being negotiated by major powers including the United States "paves Iran's path to the bomb."